Regex Tester & Debugger

Regular Expressions (Regex) are powerful patterns used for text search and manipulation. Use this tool to draft your expressions, test them against live text, and debug your match logic instantly.

What is Regex?

A Regular Expression is a sequence of characters that forms a search pattern. It is used by almost every modern programming language (Python, JavaScript, PHP) for string searching, validation (like checking if an email is formatted correctly), and advanced text editing.

Common Syntax Cheat Sheet

. : Matches any single character.
\d : Matches any digit (0-9).
\w : Matches any alphanumeric character (word character).
+ : Matches 1 or more of the preceding element.
* : Matches 0 or more of the preceding element.
^ and $ : Anchors (Start and End of a line).

Testing Tips

If your matches aren't appearing, check your flags first. If you want to find every instance of a pattern rather than just the first one, ensure the Global (g) flag is checked. If your search is case-sensitive and not returning results, try toggling the Insensitive (i) flag.